CXCL5 and pancreatic ductal adenocarcinoma: In particular, this refers to C-X-C motif ligand 5 (CXCL5, epithelial neutrophil-activating protein 78 (ENA78)) and CXCL8, which expression in pancreatic ductal adenocarcinoma tumors are the highest among CXCR2 ligands [166].